Bleeding after taking progesterone is related to the state of the endometrium and the level of estrogen and progesterone in the body. Progesterone is a kind of progesterone, taking progesterone is mainly for supplemental progesterone, so that the endometrium of the proliferative phase is transformed into the secretory phase, usually will not bleed during the period of medication, and only after stopping the drug, menstruation will occur. However, if you take progesterone in the late menstrual period, when the body’s estrogen and progesterone levels are low, irregular shedding of the uterine lining may cause bleeding symptoms. At the same time, if the effective dose of progesterone is not reached, the endometrium has not been successfully transformed from the proliferative phase to the secretory phase, and the endometrium is in an unstable state, bleeding symptoms may also occur. Therefore, if a small amount of bleeding occurs during the period of taking progesterone, you can continue to take the medicine, but if there is more bleeding, you can suspend the medicine and wait until the end of menstruation to assess whether to take the medicine.